Fine flaky boehmite particles amd process for the preparation of

Details Fine flaky boehmite particles amd process for the preparation of Fine flaky boehmite particles amd process for the preparation of

1993-12-17

1995-03-28

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Aluminum compound containing

501127, 423629, 423625, C04B 3510

Patent

active

054017033

ABSTRACT:
Fine flaky boehmite particles which have an orthorhombic crystal form and a specified crystal face grown in the form of a flat plate, and a process for the preparation of fine flaky boehmite particles which comprises subjecting aluminum hydroxide or hydrated alumina having a particle size adjusted to the order of submicrons to hydrothermal treatment in water or an aqueous alkali solution at a temperature of 150.degree. C. or above under a pressure of 100 atm or below. The fine flaky boehmite particles are useful as a starting material for the preparation of fine flaky alumina particles or as a filler suitable for a pigment for coating materials, a filler for rubbers and plastics and a coating material for paper making.

REFERENCES:
patent: 4716029 (1987-12-01), Oguri et al.

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